[according to Brewer from the name of a tailor.] An overcoat of a particular shape formerly worn by men. (Still in slang or humorous use.)
1817. T. L. Peacock, Nightmare Abbey, 159. His heart is seen to beat through his upper benjamin.
1837. Lockhart, Scott (1839), V. 59. A vastly scientific and rather grave professor in a smooth drab benjamin.
1841. Punch, I. 98. This coat is, in fact, a cross between the dress and the driving, and may, perhaps, be described as a Benjamin, junior.
Of the Benjamin, senior, there are several kindsthe Taglioni the Pea, the Monkey, the Box, et sui generis.
1865. Pall Mall Gaz., 7 March, 3/2. [quoting East-end slang].